Expansion shell-reamer and arbor therefor.



A. ALEXANDER.

EXPANSION SHELL REAMER AND ARBOR THEREFOR.

APPLICATION FILED JULY 8.1916.

1 2 391 Patented Jan. 2,1917.

Expansion Shell Reamers ANDBEW ALEXANDER, OF

NEW YORK, N. Y.

EXPANSION SHELIi-BEAMEB AND ARBOR THEREFOR.

miaeei.

Specification of Letters Iatent.

. Patented Jan. 2, 191?.

Application filed July a, 1916. Serial No. 108,169.

To all whom it may concern:

Be it known that 1, ANDREW ALEXANDER, a subject of the King of Great Britain, and residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in and Arbors Therefor, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates'to expansion shell reamers and the invention involves an improved method of expanding said reamers together with improved means by which said expansion is accomplished or said method carried into effect.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts ignated by suitable reference characters in each of the views, and in which 1-- Figure 1 is a .side and sectional view of my improvement complete with part of the construction broken away; Fig. 2 a transverse section onthe line 2-2 of Fig. 1; Fig. .3 a side view of an improved arbor which I employ with section; and, Fig. 4 a view looking in the direction of the arrow 4 of Fig. 2 and showing only a part of the construction.

In Figs. 1 and 3 of the drawing, 1 have shown at a an arbor such as usually employed in connection with devices of this class, and one end of which is provided with reduced portions a, a (1- and a, the reduced portions a and a being threaded as clearly shown, and the reduced portions a and a a and a, and a and a respectively being joined by beveled portions a, a and a Adjustably mounted on the reduced threaded portion-a is nut 6 having in one side thereof an annular beveled recess 1), and mounted on the threaded reduced portiona is a lock nut or sleeve 0,

one side of which is provided with an annular beveled recess 0 Mounted on the reduced portions a and a is an expansion shell reamer d of a well known construction and having a plurality of teeth or blade members. d, said reamer (1 being provided with oppositely arranged longitudinal saw cuts d and d", whereby said reamer may be expanded as will be readily understood and the bore of said reamer is provided with after which the of my improvement are desparts connected therewith in the arbor being supplemental an adjusting sleeve or beveled faces d, d and d which operate respectively in connection with the beveled portions a, a and a on the arbor a, or. the reduced portions thereof, and the end portions of the reamer d are provided with-external beveled faces d and d which operate in conjunction with the annular beveled recesses b and 0 respectively. The bore of the reamer d is provided between the beveled faces 11 and d with a key slot or aperture: al in connection with which a key a mounted on the reduced portion a. of the arbor a as clearly shown in Figs. 1 and 3 operates. With this construction the reamer d may be placed on the reduced portions of the arbor a, as above described, and the nut or collar 6 adjusted to the desired position to govern the extent of the expansion of said reamer lock nut. c is operated to force the reamer d against, or in the direction of the nut or'collar b in which operation the beveled faces (i d and d operate in connection with the beveled portions 0,, a and a, to expand the reamer, or the perimeter thereof, to the desired extent, it being understood that the extent of said expansion is within certain limits and with my improvement it will be seen that the said expansion is uniform, or will be the same throughout the full length of the reamer due to the arrangement of the beveled faces on the arbor, and within the reamer at the ends and centrally thereof.

From the foregoing description it will be seen that the-parts a a, a, an and a constitute the operative parts of the arbor in the operation of adjusting and expanding the reamer, the nut or collar 1) and the nut c and the screw-threaded parts a and a of tuting the parts'whereby the reamer-1s adjusted on the arbor to effect its expansion,

It will also be understood that my invention is not limited to any specific form 0 reamer as to the cutting means, or the means for producing or permitting the expansion thereof, and tions of the details of construction herein shown and described may be made, within the scope of the appended claim, without departing from the spiritof my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is c An apparatus of the class descr bed,- com and constichanges therein and modificabevel and a screw-threaded extension on which is mounted a nut provided in its inner face with an annular groove the wall of which is beveled, in combination with an I expansion reamer adapted to be mounted on the reduced cylindrical parts of the arbor and the bore of which is of difierent diamend portion being eters to correspond with the different diameters of the reduced cylindrical portions of the arbor and the central part and ends of said bore being beveled to correspond with the beveled parts at the inner and outer ends of said portions of the arbor and centrally thereof, and the end portions of said reamer being also beveled to correspond with the annular beveled grooves in said collar and nut.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 6th day of July 1916. 7

ANDREW ALEXANDER. Witnesses:

C. E. MULREANY, H. E. THOMPSON. 

